/ Thesaurus / G Synonyms of genus nyctaginia Find synonyms for: Noun1. Nyctaginia, genus Nyctaginia, caryophylloid dicot genususage: a caryophyllaceous genus of the family Nyctaginaceae having only one speciesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fortuitous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language